/**
 * #      1311
 * 名称   获取你好友已观看的视频
 * 链接   https://leetcode-cn.com/problems/get-watched-videos-by-your-friends
 * 题解   [72](https://leetcode-cn.com/problems/get-watched-videos-by-your-friends/solution)
 * 通过率 36.9%
 * 难道   中等
 */

